RE: Lipo Receiver
What you are looking for is called a "BEC" or "UBec".
I use these
[link=http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6313&Product_Name=Turnig y_MEGABEC_8_]Click me![/link]
And they work great.
Look around you'll find a lot of these available from many sources.